“ By virtue of the authority vested in me by the Foreign Service Act of 1946 (60 Stat. 999) and by section 202 of the Revised Statutes of the United States (5 U.S.C. 156) , the provisions of Executive Order No. of July 8, 1947, prescribing regulations pertaining to the granting of and accounting for certain foreign service allowances and allotments, are hereby extended and continued in effect to and including June 30, 1949. ”